@ ProgramNode (location: (1,0)-(1,17)) ├── locals: [] └── statements: @ StatementsNode (location: (1,0)-(1,17)) └── body: (length: 1) └── @ DefNode (location: (1,0)-(1,17)) ├── name: :x ├── name_loc: (1,4)-(1,5) = "x" ├── receiver: ∅ ├── parameters: │ @ ParametersNode (location: (1,6)-(1,11)) │ ├── requireds: (length: 0) │ ├── optionals: (length: 0) │ ├── rest: ∅ │ ├── posts: (length: 0) │ ├── keywords: (length: 0) │ ├── keyword_rest: │ │ @ NoKeywordsParameterNode (location: (1,6)-(1,11)) │ │ ├── operator_loc: (1,6)-(1,8) = "**" │ │ └── keyword_loc: (1,8)-(1,11) = "nil" │ └── block: ∅ ├── body: ∅ ├── locals: [] ├── def_keyword_loc: (1,0)-(1,3) = "def" ├── operator_loc: ∅ ├── lparen_loc: (1,5)-(1,6) = "(" ├── rparen_loc: (1,11)-(1,12) = ")" ├── equal_loc: ∅ └── end_keyword_loc: (1,14)-(1,17) = "end"